In their recent paper, Chan and Lee discuss an interesting possibility: radio continuum emission from a dwarf irregular galaxy may be used to constrain upper limits on the cross section of annihilating dark matter. They claim that the contributions from nonthermal and thermal emission can be estimated with such accuracy that one can place new upper limits on the annihilation cross section. We argue that the observations presented can be explained entirely with a standard spectrum and no contribution from dark matter. As a result, the estimated upper limits of Chan and Lee are at least by a factor of 100 too low.

中文翻译：

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评论“通过NGC4214星系的无线电连续谱光谱数据约束the灭的暗物质质量”

Chan和Lee在他们最近的论文中讨论了一个有趣的可能性：矮矮星系不规则星系的无线电连续辐射可以用来约束to灭暗物质横截面的上限。他们声称，非热和热辐射的贡献可以这样精确地估算，以至于可以在an灭截面上设置新的上限。我们认为，提出的观测结果可以完全用标准光谱来解释，而暗物质没有贡献。结果，Chan和Lee的估计上限至少低了100倍。